/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.ambari.logsearch.util;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;

import org.apache.ambari.logsearch.common.LogSearchConstants;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateUtils;
import org.apache.log4j.Logger;

public class DateUtil {

  private DateUtil() {
    throw new UnsupportedOperationException();
  }

  public static String convertDateWithMillisecondsToSolrDate(Date date) {
    if (date == null) {
      return "";
    }
    SimpleDateFormat formatter = new SimpleDateFormat(LogSearchConstants.SOLR_DATE_FORMAT_PREFIX_Z, Locale.ENGLISH);
    TimeZone timeZone = TimeZone.getTimeZone("GMT");
    formatter.setTimeZone(timeZone);

    return formatter.format(date);
  }
}
